### 摘要

We study the real-time evolution of large open quantum spin systems in two spatial dimensions, whose dynamics is entirely driven by a dissipative coupling to the environment. We consider different dissipative processes and investigate the real-time evolution from an ordered phase of the Heisenberg or XY model towards a disordered phase at late times, disregarding unitary Hamiltonian dynamics. The corresponding Kossakowski-Lindblad equation is solved via an efficient cluster algorithm. We find that the symmetry of the dissipative process determines the time scales, which govern the approach towards a new equilibrium phase at late times. Most notably, we find a slow equilibration if the dissipative process conserves any of the magnetization Fourier modes. In these cases, the dynamics can be interpreted as a diffusion process of the conserved quantity.

原文 | 英語 |
---|---|

文章編號 | 035116 |

期刊 | Physical Review B - Condensed Matter and Materials Physics |

卷 | 92 |

發行號 | 3 |

DOIs | |

出版狀態 | 已發佈 - 2015 七月 9 |

### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics

## 指紋 深入研究「Real-time dynamics of open quantum spin systems driven by dissipative processes」主題。共同形成了獨特的指紋。

## 引用此

*Physical Review B - Condensed Matter and Materials Physics*,

*92*(3), [035116]. https://doi.org/10.1103/PhysRevB.92.035116